[Ada] Allow Ada 2012 aspects on renaming declarations

[Arnaud Charlet]

This patch completes the implementation of Ada 2012 aspects on all
renaming declarations. This is only relevant for implementation-defined
aspects such as Warnings, as shown by the following example program
which is compiled with -gnatwa -gnatld7

     1. pragma Ada_2012;
     2. procedure renameaspect is
     3.    Q : Integer with Warnings => Off;
     4.    R : Integer renames Q with Warnings => On;
           |
        >>> warning: renamed variable "R" is not referenced

     5.    X : Integer with Warnings => Off;
     6.    Y : Integer renames X with Warnings => Off;
     7. begin
     8.    null;
     9. end;

Tested on x86_64-pc-linux-gnu, committed on trunk

2013-01-29  Robert Dewar  <dewar@adacore.com>

	* aspects.ads: Aspect Warnings is implementation defined Add
	some other missing entries to impl-defined list Mark Warnings
	as GNAT pragma in main list.
	* sem_ch8.adb: Process aspects for all cases of renaming
	declarations.

-------------- next part --------------
Index: aspects.ads
===================================================================
--- aspects.ads	(revision 195533)
+++ aspects.ads	(working copy)
@@ -127,7 +127,7 @@
       Aspect_Unsuppress,
       Aspect_Value_Size,                    -- GNAT
       Aspect_Variable_Indexing,
-      Aspect_Warnings,
+      Aspect_Warnings,                      -- GNAT
       Aspect_Write,
 
       --  The following aspects correspond to library unit pragmas
@@ -234,6 +234,7 @@
                              Aspect_Favor_Top_Level          => True,
                              Aspect_Global                   => True,
                              Aspect_Inline_Always            => True,
+                             Aspect_Invariant                => True,
                              Aspect_Lock_Free                => True,
                              Aspect_Object_Size              => True,
                              Aspect_Persistent_BSS           => True,
@@ -243,18 +244,19 @@
                              Aspect_Pure_12                  => True,
                              Aspect_Pure_Function            => True,
                              Aspect_Remote_Access_Type       => True,
+                             Aspect_Scalar_Storage_Order     => True,
                              Aspect_Shared                   => True,
-                             Aspect_Scalar_Storage_Order     => True,
                              Aspect_Simple_Storage_Pool      => True,
                              Aspect_Simple_Storage_Pool_Type => True,
                              Aspect_Suppress_Debug_Info      => True,
                              Aspect_Test_Case                => True,
+                             Aspect_Universal_Aliasing       => True,
                              Aspect_Universal_Data           => True,
-                             Aspect_Universal_Aliasing       => True,
                              Aspect_Unmodified               => True,
                              Aspect_Unreferenced             => True,
                              Aspect_Unreferenced_Objects     => True,
                              Aspect_Value_Size               => True,
+                             Aspect_Warnings                 => True,
                              others                          => False);
 
    --  The following array indicates aspects for which multiple occurrences of
Index: sem_ch8.adb
===================================================================
--- sem_ch8.adb	(revision 195533)
+++ sem_ch8.adb	(working copy)
@@ -554,6 +554,14 @@
             Set_Renamed_Object (Id, Entity (Nam));
          end if;
       end if;
+
+      --  Implementation-defined aspect specifications can appear in a renaming
+      --  declaration, but not language-defined ones. The call to procedure
+      --  Analyze_Aspect_Specifications will take care of this error check.
+
+      if Has_Aspects (N) then
+         Analyze_Aspect_Specifications (N, Id);
+      end if;
    end Analyze_Exception_Renaming;
 
    ---------------------------
@@ -681,6 +689,14 @@
 
          Check_Library_Unit_Renaming (N, Old_P);
       end if;
+
+      --  Implementation-defined aspect specifications can appear in a renaming
+      --  declaration, but not language-defined ones. The call to procedure
+      --  Analyze_Aspect_Specifications will take care of this error check.
+
+      if Has_Aspects (N) then
+         Analyze_Aspect_Specifications (N, New_P);
+      end if;
    end Analyze_Generic_Renaming;
 
    -----------------------------
@@ -728,8 +744,7 @@
             then
                null;
 
-            --  A renaming of an unchecked union does not have an
-            --  actual subtype.
+            --  A renaming of an unchecked union has no actual subtype
 
             elsif Is_Unchecked_Union (Typ) then
                null;
@@ -800,9 +815,7 @@
       --  when the renaming is generated in removing side effects of an
       --  already-analyzed expression.
 
-      if Nkind (Nam) = N_Selected_Component
-        and then Analyzed (Nam)
-      then
+      if Nkind (Nam) = N_Selected_Component and then Analyzed (Nam) then
          T := Etype (Nam);
          Dec :=  Build_Actual_Subtype_Of_Component (Etype (Nam), Nam);
 
@@ -1235,6 +1248,17 @@
       end if;
 
       Set_Renamed_Object (Id, Nam);
+
+      --  Implementation-defined aspect specifications can appear in a renaming
+      --  declaration, but not language-defined ones. The call to procedure
+      --  Analyze_Aspect_Specifications will take care of this error check.
+
+      if Has_Aspects (N) then
+         Analyze_Aspect_Specifications (N, Id);
+      end if;
+
+      --  Deal with dimensions
+
       Analyze_Dimension (N);
    end Analyze_Object_Renaming;
 
@@ -1381,6 +1405,14 @@
             end;
          end if;
       end if;
+
+      --  Implementation-defined aspect specifications can appear in a renaming
+      --  declaration, but not language-defined ones. The call to procedure
+      --  Analyze_Aspect_Specifications will take care of this error check.
+
+      if Has_Aspects (N) then
+         Analyze_Aspect_Specifications (N, New_P);
+      end if;
    end Analyze_Package_Renaming;
 
    -------------------------------